Hi there! I have read your question, and it sounds as if you are aware that something needs to change in order for the marriage to stay strong, but just aren't sure how or what to do to increase your own desire? Many women have the same issue in midlife and low libido and other health problems can sometimes make sex seem like it is just another thing on your "to-do" list.
I am attaching a link to some information shared on WebMD that you may find helpful: http://www.webmd.com/menopause/guide/sex-drive-and-menopause?page=2
Rest asssured; you are not alone! However, physical contact and lovemaking is healthy for both the body and soul, and so if you can talk to your Dr. about some possible hormone replacement therapy to help your body get back in balance, you might find he/she has some other good advice to get things back in order.
Also, one more thought: if your husband is willing to meet you halfway on the timing, meaning spending time together being close in the morning when you feel some desire, he may find that it is worth the wait! ;-)
I see that you are offline, so I will await your reply... please let me know if you need more specific information and I will work to be sure that I have answered your question fully and completely! Thank you for using the site! :-)
Thank you for your time and advice. The WebMD site was helpful too!
Maybe between you and the tips from WebMD, I can keep our marriage strong.